JP5946756B2 - Valve and manufacturing method thereof - Google Patents

Description

  The present invention relates to a valve for closing a valve body by pressing a valve body with a compression coil spring against an opening edge of a valve hole through which fluid can pass, and to open the valve when the pressure of the fluid exceeds a predetermined reference value, and a method for manufacturing the valve About.

  Conventionally, as this type of valve, a tubular body having a valve hole at one end accommodates a valve body and a compression coil spring, and a spring receiving member is fitted and fixed to the opening edge on the other end side of the tubular body. It is known (see, for example, Patent Document 1).

JP 2002-295698 A (paragraphs [0008] to [0010], FIG. 1)

  However, in the conventional valve described above, when the biasing force of the compression coil spring in the closed state deviates from the target value due to, for example, a dimensional error of the valve body, the valve is opened when the fluid pressure deviates from a predetermined reference value. NG product to be produced. For this reason, the conventional valve has a problem of low productivity.

  This invention is made | formed in view of the said situation, and aims at provision of the valve | bulb which can improve productivity, and its manufacturing method.

In order to achieve the above object, the valve (10) according to the first aspect of the present invention comprises a valve element (22) with a compression coil spring (26) at an opening edge (21) of a valve hole (20) through which fluid can pass. ), The valve is opened when the fluid pressure exceeds a predetermined reference value, and the spring accommodating sleeve (30) for accommodating the compression coil spring (26) and the spring accommodating sleeve An annular wall projecting inwardly at one end of (30) to form an opening edge opposite to the valve element (30) of the spring accommodating sleeve (30) , and projecting inwardly from the annular wall, the spring accommodating sleeve (30) A spring receiver that is sandwiched between a plurality of projecting pieces (32) that can be bent in the axial direction, a plurality of projecting pieces (32), and a compression coil spring (26), and that is directly movable in the axial direction of the spring accommodating sleeve (30). With the member (33) Having the features.

According to a second aspect of the present invention, in the valve (10) according to the first aspect, the valve hole (20) is mounted in the valve mounting hole (91) of the fluid device (90) and communicates with the valve mounting hole (91). A valve body (11) formed so as to penetrate therethrough is characterized in that the spring accommodating sleeve (30) is fixed to the proximal end surface (11B) of the valve body (11).
According to a third aspect of the present invention, in the valve (10) according to the second aspect, the valve body (11) has a cylindrical shape whose outer shape is larger than that of the spring accommodating sleeve (30) and is flat on the base end surface (11B). It has a feature in that it has an outer peripheral part (17) and can be press-fitted into the valve mounting hole (91).
According to a fourth aspect of the present invention, in the valve (10) according to any one of the first to third aspects, a viewing window (31) is formed on the side wall of the spring accommodating sleeve (30), and the valve A valve body receiving member (23) which is sandwiched between the body (22) and the compression coil spring (26) and can move directly in the axial direction of the spring accommodating sleeve (30) is provided, and the valve body receiving member (23) is compressed. The spring contact surface (25) that contacts the coil spring (26) is characterized in that it is disposed closer to the compression coil spring (26) than the viewing window (31) when the valve is closed.
According to a fifth aspect of the present invention, in the valve (10) according to any one of the first to fourth aspects, the central portion of the spring receiving member (33) protrudes in a stepped shape, and the compression coil spring (26 ) Is characterized by being inserted inside.

According to the sixth aspect of the present invention, the valve (10) is manufactured by pressing the valve element (22) with the compression coil spring (26) against the opening edge (21) of the valve hole (20) through which the fluid can pass. The valve (10) is opened when the fluid pressure exceeds a predetermined reference value, and includes a spring accommodating sleeve (30) for accommodating the compression coil spring (26), and a spring accommodating sleeve ( 30) a plurality of projecting pieces (32) projecting inwardly from the opening edge opposite to the valve body (22) and bendable in the axial direction of the spring accommodating sleeve (30), and a plurality of projecting pieces (32) And a spring receiving member (33) that is sandwiched between the compression coil spring (26) and can move directly in the axial direction of the spring accommodating sleeve (30), and is mounted in the valve mounting hole (91) of the fluid device (90). Valve hole (20) communicating with mounting hole (91) In the manufacturing method of the valve (10), the spring housing sleeve (30) is fixed to the base end surface (11B) of the valve body (11). 30) is formed by press-molding the sheet metal (70), and the bottom (71) of the sheet metal (70) formed into a cylindrical shape with one end is formed in the radial direction at a plurality of circumferential positions on the outer periphery of the circle. It is characterized in that a plurality of projecting pieces (32) are formed by punching into a strip-like shape.

According to a seventh aspect of the present invention, in the method for manufacturing the valve (10) according to the sixth aspect , the valve body (11) is formed in a columnar shape, and the outer diameter thereof is larger than the outer diameter of the spring accommodating sleeve (30). and has a characteristic outer periphery of the proximal end face of the valve body (11) (11B) (17) where the flat.

According to an eighth aspect of the present invention, in the method for manufacturing the valve (10) according to the sixth or seventh aspect , a viewing window (31) is formed on the side wall of the spring accommodating sleeve (30) and the valve body (22) is compressed. A valve body receiving member (23) which is sandwiched between coil springs (26) and can move directly in the axial direction of the spring housing sleeve (30) is provided, and contacts the compression coil spring (26) of the valve body receiving member (23). the spring abutment surface (25), in the closed state, has a feature where to place the compression coil spring (26) than the viewing window (31).

According to a ninth aspect of the present invention, in the method for manufacturing a valve (10) according to any one of the sixth to eighth aspects, the spring receiving member (33) is made of sheet metal, and the central portion thereof is stepped. It is characterized in that it is protruded like a stick and is inserted inside the compression coil spring (26).

[Inventions of Claims 1, 2 , 6 ]
In the first, second, and sixth aspects of the invention, even when the biasing force of the compression coil spring (26) in the closed state is smaller than the target value due to the dimensional error of the spring accommodating sleeve (30), a plurality of protrusions are provided. The urging force of the compression coil spring (26) can be increased by bending the piece (32) toward the valve body (22) in the axial direction of the spring accommodating sleeve (30). Thereby, the urging | biasing force of a compression coil spring (26) can be united with a target value, NG goods of a valve (10) can be decreased, and productivity can be improved.

  Here, as in the invention of claim 2, the valve (10) includes a valve body (11) attached to the fluid device (90) and having a valve hole (20) formed therethrough, and a spring accommodating sleeve (30). ) May be fixed to the base end surface (11B) of the valve body (11), or a spring housing sleeve may be formed integrally with the valve body. In the invention of claim 2, if the spring accommodating sleeve (30) is a sheet metal press-molded product, the spring accommodating sleeve (30) can be miniaturized, and the valve (10) can be miniaturized. . Further, if the valve body (11) is a metal cutting product, the dimensional accuracy of the valve hole (20) can be increased and the sealing performance can be improved.

Furthermore, as in the invention of claim 6, a plurality of projecting pieces (32), one bottom sheet metal (70) which is formed into a bottomed tubular (71), a circle multiple outer periphery circumferential direction of the If the structure is formed by punching into a shape cut in a strip shape in the radial direction at a location, the durability of the punch for punching the bottom (71) of the sheet metal (70) can be improved.

[Inventions of Claims 3 and 7 ]
In the inventions of claims 3 and 7 , since the valve body (11) can be press-fitted into the valve mounting hole (91), compared with the case where the valve body (11) is screwed to the valve mounting hole (91), The valve body (11) can be reduced in size. Thereby, size reduction of the whole valve | bulb (10) is achieved.

[Inventions of Claims 4 and 8 ]
According to invention of Claim 4 , 8 , even if a valve body (22) is arrange | positioned in arbitrary positions, the spring contact surface (25) of a valve body receiving member (23) compresses rather than an inspection window (31). Since it arrange | positions at the coil spring (26) side, it is prevented that a compression coil spring (26) catches in a view window (31).

[Inventions of Claims 5 and 9 ]
According to the fifth and ninth aspects of the present invention, the spring receiving member (23) having the stepped protrusion for positioning the compression coil spring (26) can be manufactured by press-molding the sheet metal. .

1 is a side sectional view of a valve according to a first embodiment of the present invention. Side sectional view of the valve before adjusting the biasing force Valve side view Top view of the valve, Side cross-sectional view around the projecting piece before adjusting the biasing force Side cross-sectional view around the protruding piece after adjusting the biasing force Perspective view of sheet metal before projecting pieces are formed Side sectional view around the protruding piece of the valve according to the reference embodiment Side cross-sectional view around the projecting piece during adjustment of urging force Side cross-sectional view around the protruding piece after adjusting the biasing force (A) The top view of the protrusion which concerns on a modification, (B) The top view of the sheet metal before forming a protrusion

[First Embodiment]
Hereinafter, a first embodiment in which the present invention is applied to a differential pressure regulating valve will be described with reference to FIGS. As shown in FIG. 1, the valve 10 of the present embodiment is used by mounting a valve body 11 in a valve mounting hole 91 provided in the middle of a flow path (not shown) of a fluid device 90. The valve is opened when the pressure exceeds a predetermined reference value. Examples of the fluid device 90 include a refrigerant circuit such as an air conditioner, a boiler circuit, an engine lubrication system hydraulic pressure adjustment device, and the like.

  As shown in FIG. 2, the valve 10 has a structure in which a spring accommodating sleeve 30 is fixed to a base end surface 11 </ b> B of a cylindrical valve body 11 mounted in the valve mounting hole 91. A valve hole 20 communicating with the valve mounting hole 91 is formed therethrough.

  Specifically, the distal end portion of the spring accommodating sleeve 30 is provided with a flange portion 30F projecting laterally, and the outer diameter of the valve body 11 is larger than the outer diameter of the flange portion 30F. Then, in the state where the flange portion 30F is abutted against the base end surface 11B of the valve body 11, the base end-side annular protrusion 15 rising from the base end surface 11B just outside the flange portion 30F is caulked to thereby form the spring accommodating sleeve 30. Is fixed to the valve body 11.

  Further, the outer peripheral portion of the base end surface 11B of the valve body 11 is flat, and the valve body 11 (valve 10) is fixed to the valve mounting hole 91 by pressing the flat portion 17 with, for example, a press-fitting jig. It is press-fitted and fixed. In this embodiment, the valve body 11 is a metal cutting product, and the spring accommodating sleeve 30 is a sheet metal press-molded product.

  A metal mesh 12 that covers the valve hole 20 is fixed to the distal end surface 11 </ b> A of the valve body 11. Specifically, the mesh 12 has a circular shape in plan view, and the center portion bulges out in a dome shape. The mesh 12 is assembled to the valve body 11 by fixing the mesh fixing ring 13 to the valve body 11 with the outer edge of the mesh 12 sandwiched between the tip end surface 11A of the valve body 11 and the mesh fixing ring 13. ing. Note that the mesh fixing ring 13 is fixed to the valve body 11 by caulking the tip-side annular protrusion 14 that rises from the outer periphery of the tip surface 11A of the valve body 11.

  As shown in FIG. 2, the valve hole 20 is reduced in diameter from the distal end of the valve body 11 to an intermediate position in the axial direction, and a portion on the proximal end side from the intermediate position has the same diameter. The valve hole 20 opens and closes when the ball-shaped valve element 22 contacts and separates from the opening edge 21 on the base end side of the valve hole 20 from the outside (base end side).

  The valve body 22 is pressed against the opening edge 21 of the valve hole 20 under the urging force of the compression coil spring 26 housed in the spring housing sleeve 30 described above. Specifically, a valve body receiving member 23 is provided between the valve body 22 and the compression coil spring 30, and the valve body 22 receives a biasing force of the compression coil spring 26 through the valve body receiving member 23. In this embodiment, the valve body 22 is made of stainless steel, and the valve body receiving member 23 is a metal forged product.

The entire valve body receiving member 23 has a shape in which the tip of a cylinder is expanded in a stepped shape, and a valve body receiving surface 24 that is recessed into a conical shape and contacts the valve body 22 is formed on the front end surface. Is formed. Further, the surface facing the base end side in the enlarged diameter portion of the valve body receiving member 23 is a spring contact surface 25 that contacts the compression coil spring 26, and the spring contact surface 25 of the valve body receiving member 23 is larger than the spring contact surface 25. The proximal end portion is inserted inside the compression coil spring 23. In addition, the base end part of the valve body receiving member 23 is reduced in diameter in a taper shape .

  As shown in FIG. 3, in the valve 10, a plurality of viewing windows 31 are formed on the side wall of the distal end portion of the spring accommodating sleeve 30, and the position of the valve body 22 can be confirmed through the viewing window 31. Specifically, in the valve-closed state, when the valve body 22 and the distal end portion of the valve body receiving portion 23 are visually recognized from the viewing window 31 and the valve body 22 moves to the proximal end side of the spring accommodating sleeve 30 and opens the valve. The boundary line L <b> 1 between the valve body 22 and the valve body receiving member 23 moves to the proximal end side of the viewing window 31. Here, in the valve-closed state, the spring contact surface 25 of the valve body receiving member 23 is disposed on the proximal end side with respect to the viewing window 31 (see FIGS. 1 and 2). Therefore, even if the valve body 22 is disposed at an arbitrary position, the compression coil spring 30 is disposed on the proximal end side with respect to the viewing window 31, and the compression coil spring 30 is prevented from being caught by the viewing window 31.

  As shown in FIGS. 2 and 4, the spring accommodating sleeve 30 is provided with a plurality of (for example, three) projecting pieces 32 projecting inwardly from the opening edge on the base end side. The plurality of projecting pieces 32 are arranged at equal intervals in the circumferential direction of the spring housing sleeve 30, and the tips of the projecting pieces 32 are arranged at positions equidistant from the center of the spring housing sleeve 30 (see FIG. 4). .

  A spring receiving member 33 sandwiched between the plurality of projecting pieces 32 and the compression coil spring 26 is provided so as to be linearly movable in the axial direction of the spring accommodating sleeve 30. The spring receiving member 33 is formed by press-molding a sheet metal, and includes a positioning protrusion 34 that protrudes in a stepped manner toward the distal end side of the spring accommodating sleeve 30 and is inserted into the compression coil spring 26 at the center. Yes. A through hole 33 </ b> A is formed at the center of the positioning protrusion 34.

  Here, in the valve 10 of the present embodiment, the plurality of projecting pieces 32 can be bent in the axial direction of the spring accommodating sleeve 30, and the compression coil spring 26 in the valve-closed state is bent by bending the plurality of projecting pieces 32. The biasing force can be adjusted. The valve 10 is used in a state where the urging force of the compression coil spring 26 is adjusted so as to become a preset target value (see FIG. 1). 2 and 5 show a state before the protruding piece 32 is bent, and the protruding piece 32 is orthogonal to the axial direction of the spring accommodating sleeve 30. 1 and 6 show a state after the protrusion 32 is bent.

  Next, a method for manufacturing the valve 10 will be described. In order to manufacture the valve 10, first, the valve body 11 and the spring accommodating sleeve 30 are manufactured. As described above, the valve body 11 is manufactured by metal cutting, and the spring accommodating sleeve 30 is manufactured by press molding of the sheet metal 70 (see FIG. 7).

  Here, the plurality of projecting pieces 32 are manufactured as follows. That is, the sheet metal 70 is formed into a cylindrical shape with one end, and the bottom 71 of the sheet metal 70 is cut with a punch 72 and the outer periphery of the circle is cut into a strip shape in a radial direction at a plurality of circumferential positions. It is punched into a shape (a shape indicated by a one-dot chain line in FIG. 7). Then, a plurality of projecting pieces 32 (see FIG. 4) projecting inward from the opening edge of the circular hole are formed. Thus, in the present embodiment, the shape of punching the sheet metal 70 is the petal shape as described above, so that the durability of the punch 72 is improved.

  When the valve body 11 and the spring housing sleeve 30 are manufactured, the spring housing sleeve 30 is fixed to the valve body 11 and the mesh 12 is assembled to the valve body 11.

  Next, the plurality of projecting pieces 32 of the spring accommodating sleeve 30 are bent to adjust the urging force of the compression coil spring 26 in the valve closed state. Specifically, as shown in FIGS. 2 and 4, the center of the biasing force adjusting jig 80 whose tip is conical is arranged on the axial center line of the spring accommodating sleeve 30 on the proximal end side of the spring accommodating sleeve 30. Then, the plurality of projecting pieces 32 are bent until the urging force of the compression coil spring 30 reaches a target value by pressing the urging force adjusting jig 80 close to the spring accommodating sleeve 30 and pressing the plurality of projecting pieces 32 (FIG. 5). reference). In this embodiment, since the tip of the biasing force adjusting jig 80 is conical, the plurality of projecting pieces 32 can be bent evenly, and variations in the biasing force of the compression coil spring 26 in the circumferential direction can be suppressed.

  As described above, the valve 10 in which the urging force of the compression coil spring 30 in the valve closed state becomes the target value is obtained. In this embodiment, the target value of the biasing force of the compression coil spring 30 is set to a certain range, and the length of the spring accommodating sleeve 30 is the lower limit value of the target range of the biasing force of the compression coil spring 26. Designed to be in the vicinity. And only the valve | bulb 10 in which the urging | biasing force of the compression coil spring 10 was less than the lower limit WHEREIN: The protrusion 32 is bent and urging | biasing force is adjusted.

  This completes the description of the valve 10 and the manufacturing method thereof according to the present embodiment. Next, the effect of the valve 10 and the manufacturing method thereof will be described.

  The valve 10 of the present embodiment is used with the valve body 11 being press-fitted and fixed in the valve mounting hole 91. Normally, when the valve body 22 is pressed against the opening edge 21 of the valve hole 20 by the compression coil spring 26 and is closed, the pressure of the fluid in the valve mounting hole 91 becomes larger than a predetermined reference value. The body 22 moves to the proximal end side of the spring accommodating sleeve 30 against the urging force of the compression coil spring 26 and opens the valve.

  Here, when the biasing force of the compression coil spring 26 in the closed state deviates from a target value due to a dimensional error of the valve body 11 or the spring accommodating sleeve 30, the valve is opened when the fluid pressure deviates from a predetermined reference value. NG product may be generated.

  However, in the valve 10 of the present embodiment, even when the urging force of the compression coil spring 26 in the closed state is smaller than the target value, the plurality of projecting pieces 32 are arranged in the axial direction of the spring housing sleeve 30 in the valve body 22. The urging force of the compression coil spring 26 can be increased by bending it to the side (that is, the tip side). Thereby, the urging force of the compression coil spring 26 can be adjusted to the target value, the number of NG products of the valve 10 can be reduced, and the productivity can be increased.

  In the present embodiment, the spring housing sleeve 30 is fixed to the base end surface 11B of the valve body 11 as a press-molded product of sheet metal. Therefore, the spring housing sleeve 30 can be reduced in size, and consequently the valve 10 Miniaturization is achieved. Further, since the valve body 11 is a metal cut product, the dimensional accuracy of the valve hole 20 can be increased and the sealing performance can be improved.

  In addition, since the valve body 11 can be press-fitted into the valve mounting hole 91, the valve body 11 can be downsized compared to the case where the valve body 11 is screwed into the valve mounting hole 91, and the overall size of the valve 10 is reduced. Is achieved.

[ Reference embodiment ]
Hereinafter, although not belonging to the technical scope of the present invention, a reference embodiment capable of producing the same effect as the present invention will be described with reference to FIGS. The valve 10V of the present embodiment is a modification of the valve 10 of the first embodiment, and the configurations of the “spring receiving member” and the “projection piece” are mainly different.

  As shown in FIG. 8, the spring receiving member 33V of the valve 10V has a truncated cone shape with a reduced diameter on the proximal end side, and the center portion of the distal end surface projects in a stepped shape to form a positioning projection 34V. .

  Further, the plurality of projecting pieces 32V in the valve 10V are inclined so that the distal end portion of the projecting piece 32V faces the proximal end side of the spring accommodating sleeve 30 before the urging force of the compression coil spring 26 is adjusted. The inclination angle is the same as the inclination angle of the side surface with respect to the central axis of the spring receiving member 33V. The surface of the projecting piece 32V facing the tip of the spring accommodating sleeve 30 and the side surface of the spring receiving member 33V are in surface contact.

  Also in the present embodiment, the urging force of the compression coil spring 30 is adjusted by bending the plurality of projecting pieces 32V as in the first embodiment. When the protruding piece 32V is bent, the protruding piece 32V is orthogonal to the axial direction of the spring accommodating sleeve 30 (see FIG. 9), and when the protruding piece 32V is further bent, the tip of the protruding piece 32V is the tip of the spring accommodating sleeve 30. Face to the side (see FIG. 10). As a result, the displacement amount of the spring receiving member 33V in the axial direction of the spring accommodating sleeve 30 becomes larger than the displacement amount of the spring receiving member 30 of the first embodiment.

  As described above, in the present embodiment, since the projecting piece 32V is inclined toward the proximal end side of the spring accommodating sleeve 30 before the biasing force of the compression coil spring 26 is adjusted, In comparison, the amount of displacement of the spring receiving member 33V due to the bending of the protruding piece 32V can be increased. Accordingly, even when the urging force of the compression coil spring 26 in the valve-closed state is significantly lower than the target value, the urging force of the compression coil spring 26 can be adjusted to the target value. Can be reduced to increase productivity.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various modifications are possible within the scope of the invention other than the following. It can be changed and implemented.

  (1) In the above embodiment, the example in which the present invention is applied to the differential pressure regulating valve has been shown. However, the present invention may be applied to a check valve, a relief valve, a safety valve, and the like.

  (2) In the above embodiment, the tip shape of the urging force adjusting jig 80 is a conical shape. However, other tapered shapes (for example, a frustum shape or a triangular pyramid shape) may be used, or a spherical shape. Or hemispherical. Moreover, the cylinder smaller than the outer diameter of the petal-shaped hole formed in the bottom part 71 of the sheet metal 71 may be sufficient.

  (3) In the above embodiment, the valve body receiving member 23 is provided separately from the valve body 22, but the valve body 22 and the valve body receiving member 23 are integrated into a valve body. It is good also as a structure which is not provided with a body receiving member.

  (4) Although the through hole 33A is provided in the spring receiving member 33 in the first embodiment, a configuration in which the through hole 33A is not provided may be employed. Even with such a configuration, the fluid introduced into the valve 10 from the valve hole 20 when the valve is opened is discharged from the viewing window 31 to the outside of the valve 10.

  (5) As shown in FIG. 11 (A) and FIG. 11 (B), a center hole 35 is formed through the bottom 71 of the sheet metal 70 formed into a cylindrical shape with one end, and from the center hole 35. The protrusions 32W may be formed by providing the slits 36 radially.

10, 10V valve 11 valve body 20 valve hole 21 opening edge 22 valve body 23 valve body receiving member 25 spring contact surface 26 compression coil spring 30 spring accommodating sleeve 31 viewing window 32, 32V, 32W protruding piece 33, 33V spring receiving member 80 Biasing force adjustment jig 90 Fluidic equipment 91 Valve mounting hole

Claims (9)

When the valve element (22) is pressed against the opening edge (21) of the valve hole (20) through which the fluid can pass by the compression coil spring (26) to close the valve, and the pressure of the fluid becomes larger than a predetermined reference value In the valve (10) that opens to
A spring accommodating sleeve (30) for accommodating the compression coil spring (26);
An annular wall projecting inwardly at one end of the spring accommodating sleeve (30) to form an opening edge on the opposite side of the valve body (30) of the spring accommodating sleeve (30);
A plurality of projecting pieces (32) protruding inward from the annular wall and bendable in the axial direction of the spring accommodating sleeve (30);
A spring receiving member (33) sandwiched between the plurality of projecting pieces (32) and the compression coil spring (26) and capable of linearly moving in the axial direction of the spring accommodating sleeve (30) is provided. Valve (10). A valve body (11) mounted in the valve mounting hole (91) of the fluid device (90) and having the valve hole (20) communicating with the valve mounting hole (91) formed therethrough;
The valve (10) according to claim 1, wherein the spring accommodating sleeve (30) is fixed to a proximal end surface (11B) of the valve body (11). The valve body (11) has a cylindrical shape whose outer shape is larger than that of the spring accommodating sleeve (30), and has a flat outer peripheral portion (17) on the base end surface (11B), and the valve mounting hole (91 The valve (10) according to claim 2, wherein the valve (10) is configured to be press-fitted into the press. A viewing window (31) is formed on the side wall of the spring accommodating sleeve (30), and is sandwiched between the valve body (22) and the compression coil spring (26) in the axial direction of the spring accommodating sleeve (30). A directly movable valve body receiving member (23) is provided;
A spring contact surface (25) that contacts the compression coil spring (26) of the valve body receiving member (23) is disposed closer to the compression coil spring (26) than the viewing window (31) when the valve is closed. 4. The valve (10) according to any one of claims 1 to 3, wherein the valve (10) is provided. The center part of the said spring receiving member (33) protrudes in a step shape, and is penetrated inside the said compression coil spring (26), The claim in any one of Claims 1 thru | or 4 characterized by the above-mentioned. The valve (10) described. When the valve element (22) is pressed against the opening edge (21) of the valve hole (20) through which the fluid can pass by the compression coil spring (26) to close the valve, and the pressure of the fluid becomes larger than a predetermined reference value A method for manufacturing a valve (10) that opens to
A spring accommodating sleeve (30) for accommodating the compression coil spring (26);
A plurality of projecting pieces (32) projecting inward from an opening edge of the spring accommodating sleeve (30) opposite to the valve body (22) and bendable in the axial direction of the spring accommodating sleeve (30);
A spring receiving member (33) which is sandwiched between the plurality of projecting pieces (32) and the compression coil spring (26) and can move in the axial direction of the spring accommodating sleeve (30);
A valve body (11) mounted in the valve mounting hole (91) of the fluid device (90) and having the valve hole (20) communicated with the valve mounting hole (91) formed therethrough,
In the method of manufacturing the valve (10) in which the spring accommodating sleeve (30) is fixed to the base end surface (11B) of the valve body (11),
The spring accommodating sleeve (30) is formed by press molding a sheet metal (70),
The bottom (71) of the sheet metal (70) formed into a cylindrical shape with one end is punched out into a shape obtained by cutting the outer periphery of a circle into a strip in the radial direction at a plurality of locations in the circumferential direction. 32) is formed, The manufacturing method of the valve | bulb (10) of description characterized by the above-mentioned. While making the said valve body (11) cylindrical, the outer diameter is made larger than the outer diameter of the said spring accommodation sleeve (30),
The method for manufacturing a valve (10) according to claim 6, wherein the outer peripheral portion (17) of the base end face (11B) of the valve body (11) is flattened. A viewing window (31) is formed on the side wall of the spring housing sleeve (30), and is sandwiched between the valve body (22) and the compression coil spring (26) so as to extend directly in the axial direction of the spring housing sleeve (30). A movable valve body receiving member (23) is provided;
A spring contact surface (25) that contacts the compression coil spring (26) of the valve body receiving member (23) is disposed closer to the compression coil spring (26) than the viewing window (31) when the valve is closed. A method for manufacturing a valve (10) according to claim 6 or 7, characterized in that: The spring receiving member (33) is made of sheet metal, and its central portion protrudes in a stepped manner and is inserted through the inside of the compression coil spring (26). A method for manufacturing a valve (10) according to claim 1.

Images